app/views/shared/result_dir.html.erb
<h3>Result directory</h3>
<div class="result-dir row">
<% Dir.new(@path).each_entry do |f| %>
<% next if %w(. ..).include? f %>
<div class="col-md-3">
<%= link_to f, {f:f}, {class: "file btn btn-block btn-info"} %>
<span class="pull-right">
<%= number_to_human_size File.size(File.expand_path(f, @path)) %>
</span>
</div>
<% end %>
</div>